Warp-stop-motion mechanism.



No. 658,730. Patented Sept. 25, I900..

\ W. E. ALLEN.

WARP STOP MOTION MECHANISM.

(Application filed June 25, 1900 UNITED STATES PATENT OFFICE.

WILLIAM E. ALLEN, CF SALEM, MASSACHUSETTS, ASSIGNOR TO THE DRAPER COMPANY, OF PORTLAND, MAINE, AND HOPEDALE, MASSACHUSETTS.

WARP-STOP-MOTION M ECHANISM.

SPECIFICATION forming part of Letters Patent No. 658,730, dated September 25, 1900.

Application filed June 25, 1900. Serial N0. 21,401. (N 111M191.)

To aIZZ whom it may concern: cated as under normal conditions to be above Be it known that I, WILLIAM E. ALLEN, a the reentrant portion and the support, so that citizen of the United States, and a resident of when the warpthreads are in normal condi- Salem, county of Essex, State of Massachution the detectors will be held in the position 5 setts,haveinvented an Improvementin Warp shown in the drawings, the support m then Stop-Motion Mechanism, of which the followbeing at one side of the centers of gravity of ing description,in connection with the accomthe detectors. When in such position, the panying drawings, is a specification, like letreentrant portions are in the path of moveters on the drawings representing like parts. ment of a cooperating feeler f, shown as an to This invention has for its object the proangle iron having its edge f notched or duction of novel, simple, and effective warptoothed (see Fig. 4) and connected by arms f stop-motion mechanism adapted to efiect the to a rock-shaft f mounted in bearings on operation automatically of suitable stopping the brackets M, the path of movement of the means by the abnormal positioning of a defeeler preferably intersecting the support m I 5 tector released by breakage or undue slackfor a purpose to be described, the vibration ness of a warp-thread. of the feeler normally moving it in and out of My invention is particularly adapted for the reentrant portions (1' of the detectors. If use in connection with looms, though it will now a warp-thread fails or becomes unduly be hereinafter manifest that it may be also slack, its detector is permitted to turn on 2o readily employed in other textile apparatus its support m by gravity to carry its ren wherein it is necessary or-desirable to stop trant portion out of the feeler-path and to the same automatically when an abnormal bring thereinto a portion of its circular edge condition of a warp-thread occurs. farther from the support than the bottom of Figure 1 is a longitudinal sectional view of the portion 01', as shown in Fig. 3, so that the 25 a portion of a loom with one embodiment of movement of the feeler toward the support my invention applied thereto on the line a: 00, will be arrested when it engages the edge of Fig. 2. Fig. 2 is a rear elevation of a portion the detector. As the support m is in the path of the apparatus shown in Fig. 1. Fig. 3 is of the feeler, the former thus acts as a backan enlarged detail of a portion of the mechstop for the detector when so engaged and 3o anism shown in Fig. 1, and Fig. 4 is an entakes up the strain due to arrest of the feeler, larged perspective detail of a part of the and the teeth of the latter act to prevent feeler. twisting or bending of the detector at such The harnesses H, shipper-leverS,and whiptime. The stroke of the feeler toward the bar W may be and are of any usual or welldetectors is its feeling stroke, and it is upon 35 known construction in looms, the actuating such stroke that it is engaged and arrested or controlling detectors of the stop-motion by a released detector, and I prefer to efiect mechanism being herein shown between the this stroke by gravity, the return stroke bewhip-bar and harnesses. A fixed rod or deing effected by any suitable mechanism, one tector-supportmis extended across the loom form of which may be briefly described. 0 below the warp-threads w and held in brack- An arm a on the rock-shaft f is extended ets M on the frame A, and on this support rearwardly therefrom and has pivotally conare loosely mounted to move angularly or nected with it abent arm 0. provided with a rock a series of detectors 01. These detectors hunter 0. and a toe a, normally resting by are made, preferably, of thin hardened sheetits weight on an edge cam D, mounted on the 5 45 steel disks substantially circular in shape cam-shaft C, the bunter being moved by the and perforated eccentric to their centers of cam into and out of the path of one or more gravity to receive the support m, each detectappets 25 of a cam T, also on the shaft 0. tor having a notch or rentrant portion (1 Upon arrest of the feeler the hunter a is held extended inward from its periphery toward up in the path of a tappet, engagement there- I00 50 its support. A warp-receiving opening or with swinging the link or arm a to the rear. eye d is made in each detector and so 10- This arm is slot-ted at a to receive a stud d on a short lever (Z P, pivoted at its upper end at d to a link (1 hooked around the camshaft at (1 and jointed atits other end to an arm e of a rock shaft e7, provided with a knock-off arm 6 for the shipper-lever. Arod e is jointed at its ends to the arm 6 and the lower end of the lever (1 respectively, and when the hunter is acted upon by a tapp'et the link d is moved longitudinally to operate the knock-off arm. The feeling stroke of the feeler is due to gravity, and the reverse stroke is positively effected by the mechanism shown.

In order to limit the rocking movement of a detector on its support when released, I provide a stop shown as a rod on mounted in the brackets M, exterior to the detectors and toward Which stop they swing when released, as shown in Fig. 3, this stop also serving to steady the detector when it engages the feeler.

The form of detector herein shown is strong, and it can he cheaply and readily made by stamping the same out of suitable sheet metal, and the parts of the stop-motion cooperating therewith are compact and occupy small space in the apparatus to which they are applied.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In apparatus of the class described, a series of thin, fla't detectors each having a circular periphery interrupted by a rentrant portion, and a warp-receiving portion above such opening, a fixed support. upon which the detectors are rotatably mounted eccentric to their centers of gravity, and stopping means, including a feeler normally vibratable in a path intersecting the said support and movable into and out of the rentrant portions of the detectors, the latter being maintained by normal warp-threads with such portions in the feeler-path, 21 released detector turning to bring its circular edge into the path of and to arrest the feeler, to thereby effect the op eration of the stopping means, the support serving as a back-stop for the detector when so engaged.

2. In apparatus of the class described, a series of thin, flat disk-like detectors having each a warp-receiving opening and a notch inwardly extended from its periphery, a fixed support extended loosely through the detectors eccentric to their centers of gravity, stopping means, including a feeler normally vibrating into and out of the notches ot' the detectors, the latter being maintained in such position by normal Warp-threads, a released detector turning to bring its edge into the path of and to arrest the feeler, to thereby efiect the operation of the stopping means, and a fixed stop exterior to the detectors, to limit angular movement thereof when released.

3. In apparatus of the class described, a series of thin, flat disk-like detectors having each a warp-receiving opening and a notch inwardly extended from its periphery, afixed support extended loosely through the detectors eccentric to their centers of gravity, and stopping means, including a feeler normally vibrating into and out of the notches of the detectors, the feeler having a toothed edge, said detectors being maintained by normal warp-threads with their notches in the feelerpath, a released detector turning on its support to bring its periphery into the path of and to be engaged by the toothed edge of the feeler, to stop the latter and thereby ellicct the operation of the stopping means.

4. In a loom, a series of circular detectors having each a warp-eye and a rentrant portion extended inward from its periphery toward its support, a fixed axial support extended loosely through the detectors eccentric to their centers of gravity, and stopping means for the loom, including a 'feeler normally vibratable toward and from the support in the rentrant portions of the detectors, the latter being maintained by normal warpthreads with their rentrantaportions in the feeler-path, a released detector rotating on its support to bring its circular edge into the path of and to arrest the feeler, to thereby effect the operation of the stopping means.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

WILLIAM E. ALLEN.

Witnesses:

JOHN C. EDWARDS, AUGUSTA E. DEAN. 

